Basic Soap Recipe How Do You Know How Much Powder To Add To A Calculated Soap Recipe?

How do you know how much powder to add to a calculated soap recipe? - basic soap recipe

I have a soap-line calculator to determine how much oil to use in my soap, but this week I have not much to do with a few different kinds of dust and mud in them.

Is there a calculator or even a fundamental solution for transforming how the sound in the mix?